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High-precision Time-domain Ref
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2010-07-22
贾伟刚
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Time-domain reflectometry (TDR) and
time-domain transmission (TDT) are the
most common tools for verification and
analysis of the transmission properties of
high-speed systems and components.
Signal path discontinuities that cause
reflections can be precisely located and
quantified through TDR. Transmission
parameters such as attenuation, pulse
degradation and propagation times are
determined through TDT. There are three
key elements that determine the precision
of any TDR/TDT measurement system:
• The edge speed of the stimulus pulse
produced by the TDR
• The bandwidth of the channel used
to receive the pulses from the device
under test (DUT)
• The maintenance of pulse fidelity
through minimizing cabling lengths
to and from the DUT
time-domain transmission (TDT) are the
most common tools for verification and
analysis of the transmission properties of
high-speed systems and components.
Signal path discontinuities that cause
reflections can be precisely located and
quantified through TDR. Transmission
parameters such as attenuation, pulse
degradation and propagation times are
determined through TDT. There are three
key elements that determine the precision
of any TDR/TDT measurement system:
• The edge speed of the stimulus pulse
produced by the TDR
• The bandwidth of the channel used
to receive the pulses from the device
under test (DUT)
• The maintenance of pulse fidelity
through minimizing cabling lengths
to and from the DUT
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